基于多源信息的苏南典型地区县级土地利用现状与动态快速建库研究

对常熟市不同时期(1984、1992、1999、2001年),TM、SPOT、ETM Pan遥感影像多波段合成、分辨率融合、图像增强处理、精确校正与配准,建立不同影像的土地利用分类解译标志,以2001年ETM Pan合成图像为基础,通过目视判读,首先建立2001年土地利用本底数据库,通过连续对比法获得各时期常熟市土地利用数据库以及不同时期之间土地利用动态数据库。研究表明,以高分辨率原始影像建立土地利用本底数据库,较低分辨率图像做动态变化的方法是切实可行的,达到了1:5万专业制图的要求。不同分辨率影像的精确配准后不仅提高了低分辨率图像利用率,而且通过对比分析提高了判读精度,可以实现土地利用数据库快速更新。

Study on Dynamic Express Construction of Current Land Use Database Based on Multi-sources Information at County Level in the South of Jiangsu Province

In this paper, multi-phases satellite images including TM, SPOT, ETM which represented the information of Changshu of 1984,1992,1999 and 2001, respectively were dealt with multi-bands composition, precise rectification, interpretation mark establishment, computer assistant visual interpretation by the method of multi-phases-sequence-comparison and integrated technology of RS and GIS. Four years land use maps and three period dynamic maps were attained by interpreting images above. The study indicated that it was feasible to establish background database based on high-resolution image, and dynamic data base on low-resolution image, and it met the need of precision at a scale of 1:50000, this integrated technology could update the land use databases rapidly.